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VRF System always failed to run

asked 2021-07-07 21:50:36 -0500

shmily_world gravatar image

updated 2021-07-09 16:44:01 -0500

Has anyone encountered this problem: the model is normal with ideal air load or other HVAC system, but when replaced by VRF system, the simulation will always failed? C:\fakepath\微信截图_20210708104732.png C:\fakepath\1.png

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answered 2021-07-08 10:38:21 -0500

"...invalid Heating Energy Input Ratio Modifier Function of Low Part-Load Ratio Curve Name = VRF SYSTEM HEATIINGEIRLOWPLR 13 has out of range value. Curve minimum value of X = 0.500 must be <= Minimum Heat Pump Part-Load Ratio =0.250." The error file tells you what is wrong - your curve is under-defined. The heat pump can go do to a part load ratio of 0.250, but one of your curves is only specified down to 0.500. So it can't get curve values for X values between 0.25 and 0.5. Try to regenerate your equipment curves or find another source for them for the full range available to the equipment, in this case down to a part load ratio of 0.25.

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That's quite helpful! Thx a lot!!

shmily_world gravatar image shmily_world  ( 2021-07-22 05:24:17 -0500 )edit

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Asked: 2021-07-07 21:50:36 -0500

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Last updated: Jul 08